Automatic bobbin release



De.'21,1926. I 1,611,509

W. J. BRADWELL AUTOMATIC BOBBIN RELEASE Filed June 8, 1926 Patented Dec. 2l, 1926.

NETE STTS 'tenses satana erstes.

WILLIAV JOSPI-I BRADWELL, F CHARLESTON, SOUTH CAROLNA, ASSIGNOR OF ONE- HALF T0 CHRISTOPHER F. I-IOTTIN'GER,

JR., OF CHARLESTON, SOUTH CAROLINA.

AUTOMATIC BOBIBIN RELEASE.

Application filed .Tune 8,

This invention relates to automatic bobbin releases especially adapted for use in connection with yarn and thread spooling machines.

Briefly stated, an important object of this invention is to provide an automatic bobbin stop by means of which the driving connection between the bobbin and the spindle is broken when a predetermined amount of thread, yarn, or the like, has been wound upon the bobbin so that the winding of additional thread, yarn, or the like, on the spool is avoided.

Another and equally important object of the invention is to provide an automatic bobbin stop which may be easily adjusted for various diameter bobbins and which may be applied without the exercise of unusual skill to existing machines.

A further object of the invention is to provide an automatic bobbin stop which is of highly simplified construction, durable in use, and cheap to manufacture.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawing forming a part of this application and in which like numerals are yemployed to designate like 36 parts throughout the same,

Figure 1 is a side elevation of the improved bobbin stop applied; Y

Figure 2 is a group perspective of the improved bobbin stop.

In the drawing, wherein for the purpose of illustration is shown a preferred embodiment of the invention, the numeral 5 designates a spindle which, as illustrated in Figure 1, may be tapered toward the upper end thereof to support a bobbin or spool 6 upon which thread or yarn is wound. It is believed to be obvious that the weight of the bobbin 6 on the tapered spindle results in driving contact ofthe spindle with the bobbin and that when the bobbin is elevated the driving engagement between the bobbin and the spindle will be broken.

The invent-ion forming the subject matter of this application consists of a one-piece lever having a horizontal branch 7 and a forwardly tilted longitudinally curved branch 8, the branch 8 in addition to being curved longitudinally being curved transversely for contact by the thread wound upon the bobbin. Particular attention is directed to the 1926. Serial No. 114,541.

fact that the major portion of the branch 8 is on the same side of the axis of the pivot member 9 as is the approximately horizontal branch 7 so that the weight of the lever is principally at one side of the pivot point. Therefore, the upper branch 8 will be normally tilted in the direction of the spool by force of gravity.

The horizontal branch 7 is provided adjacent the inner portion thereof with a rectangular ear 10 pivoted to the bifurcated upper end of a stem 11 as indicated at 9. By bifurcating the upper end of the stem 11 a slot is formed for the reception of the ear 10 and a pair of bracing members are provided at opposite sides of the ear by means of which the lever is caused to operate in approximately the same plane at all times. In other words, the lever is held against side swaying or tilting by the bracing members at opposite sides of the ear 10.

To avoid excess swinging of the lever, the bottom of the slot in the upper portion of the lever 11 is in the path of travel of and is adapted to be engaged by the flat lower end of the ear 10. This effectively limits the oscillation of the lever. It will be readily seen that unlimited freedom of the lever would permit the branch 8 to swing in and engage the thread long before the bobbin is full or nearly full. Therefore, the branch 8 is in engagement with the thread for a very limited period.

The stem 11 is extended into the socket of a standard 111 and may be held in an adjusted position by means of a set screw 15. The stem 11 may be adjusted vertically or about its own axis.

The standard 14 is mounted on an elongated attaching plate 16 which in turn is mounted upon a base plate 17. Particular attention is directed to the fact that the attaching plate 16 is provided with a slot 18 substantially longer than a lug 19 which it receives so that the attaching plate 16 may 100 be adjusted longitudinally of thebase plate. The upstanding lug 19 which is also of elongated formation is provided with a threaded stem 20 for engagement by thumb screw 21 by means of which the attaching plate may 105 be securely held in place. Then the attaching plate 16 is positioned on the base plate 17 the lug 19 will engage the side walls of the slot 18 and thereby effectively hold the attaching plate against turning.

One end portion of the base plate 17 is provided with an opening 26 ior the reception of the shaft 5 and a hexagonal nut 2T or other suitable -fastening device may be employed to secure the base plate to the machine as will be apparent.

lith reference to the foregoing description taken in connection with the aceompa nying drawing it will be seen that the attachment provides a means whereby the thread on the spool forms a means whereby the bobbin` is automatically released from driving engagement with the spindle when the diameter oit the spool reaches a predetermined point. As previously stated, the thread on the bobbin will not engage the transversely curved portion of the lever until the diameter ot the spool approaches the proper point. rlhe release of the bobbin is accomplished without strain on the thread and to entirely detach the bobbin from the spindle it is merely necessary to swing the lever to its outer position so that the flange at the lower end oil the spool will clear the upper branch 8. lVhen the lever swung to its outer extreme position it will remain in that position until again' tilted inwardly. In other words, the bobbin may be either applied or removed without changingl the adjustment ot the machine and without inconvenience.

Having thus described the invention, what is claimed is:

l. An automatic bobbin release comprising a lever having a shorthorizontal branch and a long upwardly extending inclined branch curved transversely for engagement by the thread on a bobbin, said lever being provided with an attaching ear, and a support having a biturcated upper end portion defining a slot receiving said ear and a pair ot' bracing. members at opposite sides ol the ear, the bottom wall of said slot being in the path ot travel ot and adapted to be engaged by the lower edge of the ear to limit the swinging moven'ient ot the lever in both directions.

2. An automatic bobbin release compris ingI a lever having a short horizontal branch and a long upwardly extendingr inclined branch curved transversely for engagement by the thread on a bobbin, said lever being provided with an attaching ear, a support having a biturcated upper end portion dejlining a slot receivino said ear and a pair olf bracing members at opposite sides oit the ear, the bottom wall oit said slot being in the path ottravel oit and adapted to be engaged by the lower edge of the car to limit the swinging n'iovement ot the lever in bothv directions, and means whereby said support may be adjusted transversely and vertically.

3. An automatic bobbin release comprisn ing a lever having a short horizontal branch and a long upwardly extending inclined branch curved transversely for engagement by the thread on a bobbin, said lever being provided with an attaching ear, a support having a bi'lurcated upper end portion delining a slot receiving said ear and a pair of bracing members at opposite sides of the ear, the bottom wall olf said slot being in the path ot travel o'i and adapted to be engaged by the lower edge oi the ear to limit the swinging movement of the lever in both directions, and means `whereby said support may be adjusted transversely and vertically, said long branch oit the lever being extended in the direction oi. the short branch ot the lever.

Ll. An automaticl bobbin release compris ingl a .lever having long and short branches, the short branch being adapted to engage a bobbin and the long branch being extended over the short branch and being curved 'tor engagement by the thread on a bohbin, an ear connected to the lever, a stem pivotally supporting the ear and having means to limit the swimu 'ng of the lever, and an adjustable suppoi i 'tor said stem.

in aut iatic bobbin release comprising a lever havn j' branches, one ot' which is adapted to one'a je a :Lzpindle and the other being adapted or engagement by the thread on a hobbiu, ear carried by the lever, a stein pivotally supporting the ear and having means cti-operating with the ear to limit swinging ot the lever, a standard having a. socket adjustably receiving said stern, au attaching plate si )porting the standard and having an elongaiod slot, and a base plate having an opstanding elongated lng received in said slot to hold the attaching plate against turni and a screw extending upwardly 'trom J4id lug and having a nut adapted to enga said attaching plate to hold the attzuxhiifgl plate in an adjusted position.

(i. An automatic bobbin release comprising a lever having branches, one of which is adapted to engage a spindle and the other being adapted 'for erq ni;' ei.iiei'it by the thread on a bobbin. an ear carried by the lever, a stein pivotally sujiporting the ear and liaving means co-operatin with the ear to limit swinging oi the lever, andard havingl a socket adjnstably receiving said stem, 'an attaching plate support ing the standard and having' an elongated slot. e have plate having an upstanding elongated lug received in said slot to hold the attaching plate against turning, and a screw extending ni'nvardly troni said lug and having a nut adapted to engage said attaching plate to 4hold the attaching plate in an adji'lsted position, one end ot said base plate beingI provided with an openingl to receive a spindle.

@ln testimony wht-neel.I l allixv my signatin'e.

THALIA M JSEPH BRADVELL.

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